METHOD FOR IMPROVING THE UTILIZATION OF POLYELECTROLYTES IN DEWATERING AQUEOUS SUSPENSIONS - Patent 0385972

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EP 0 385 972 A1

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(43)	Date of publication:
	12.09.1990 Bulletin 1990/37

(21)	Application number: 87906859.0

(22)	Date of filing: 17.08.1987

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International Patent Classification (IPC):

C02F 11/ 14^{( . )}
C02F 1/ 52^{( . )}
C02F 1/ 56^{( . )}

B01D 21/ 01^{( . )}
C02F 1/ 54^{( . )}

(86)	International application number:
	PCT/US1987/001987

(87)	International publication number:
	WO 1989/001456 (23.02.1989 Gazette 1989/05)

(84)	Designated Contracting States:
	AT BE CH DE FR GB IT LI LU NL SE

(71)	Applicants:
	CAMPBELL, Joseph J Prairie Village, KS 66208 (US) EQUIVEST, INC. Prairie Village, KS 66208 (US)

(72)	Inventor:
	LANG, James, J. Springfield, OR 97477 (US)

(74)	Representative: UEXKÜLL & STOLBERG
	Patentanwälte Beselerstrasse 4 D-22607 Hamburg D-22607 Hamburg (DE)

(54)	METHOD FOR IMPROVING THE UTILIZATION OF POLYELECTROLYTES IN DEWATERING AQUEOUS SUSPENSIONS